httpClient模拟登陆校内某系统

package com.huowolf;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class Demo1 {
private static CloseableHttpClient httpclient = HttpClients.createDefault();

public static void main(String[] args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("loginName", "2013023024"));
params.add(new BasicNameValuePair("password", "2013023024"));

String url = "http://172.16.51.37/";
post(url, params);
}

private static void post(String url,List<NameValuePair> params) {
String body = null;
HttpPost httpPost = null;
CloseableHttpResponse response = null;
try {
httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));	//设置參数
response = httpclient.execute(httpPost); 				//发送请求
System.out.println(response.getStatusLine());			//打印响应状态

HttpEntity entity = response.getEntity();			 	//获取返回数据
body = EntityUtils.toString(entity);
if(entity!=null)
{
System.out.println(body);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
httpclient.close();
} catch (Exception e2) {
e2.printStackTrace();
}
}

}

}